Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
OPERATING ACTIVITIES:
Net income	$ 48,924	$ 32,579
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,273	10,985
Change in fair value of acquisition-related contingent consideration	585	198
Long-lived asset impairment loss	0	259
Loss from equity investment	0	247
Gain from sale of equity method investment	(5,785)	0
Deferred income taxes	869	(1,035)
Share-based compensation expense	3,108	2,861
Other operating activities, net	(2,327)	868
Change in operating assets and liabilities:
Accounts receivable	(11,456)	(8,160)
Inventories	1,932	(9,213)
Other assets	428	(897)
Operating liabilities	4,757	2,142
Net cash provided by operating activities	52,308	30,834
INVESTING ACTIVITIES:
Capital expenditures	(10,421)	(7,003)
Payments to Acquire Businesses, Gross	0	(12,700)
Proceeds from sale or maturity of investments	7,334	250
Purchases of investments	(502)	(255)
Proceeds (disbursements) from sale of assets, settlement of liabilities	832	(333)
Other investing activities	(2,042)	(36)
Net cash used in investing activities	(4,799)	(20,077)
FINANCING ACTIVITIES:
Dividends paid	(14,000)	(14,032)
Payments for common shares repurchased	0	(10,000)
Payments of acquisition-related contingent liability	(1,220)	(364)
Restricted stock units vested and issued	(774)	(151)
Employee stock options exercises	(2,635)	(157)
Other financing activities	(151)	0
Net cash used in financing activities	(18,780)	(24,704)
Effect of exchange rate changes on cash	(571)	172
Net increase (decrease) in cash and cash equivalents	28,158	(13,775)
Cash and cash equivalents at beginning of year	40,535	50,648
Cash and cash equivalents at end of period	$ 68,693	$ 36,873